Upscaling / Enlarging

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XnTriq
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Upscaling / Enlarging

Postby XnTriq » Tue Oct 18, 2016 4:00 am

Thanks to fellow “XnThusiast” cday, I learned about a freeware program the other day that promises better image scaling quality and can upscale and enlarge photos better than Photoshop's “Preserve Details” algorithm: Steffen Gerlach's “A Sharper Scaling is a high quality image scaling technology mainly developed for upscaling.”

XnTriq (Corrupt jpegs, thumbnail extracted...) wrote:


michel038
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Joined: Tue Sep 27, 2016 8:18 am

Re: Upscaling / Enlarging

Postby michel038 » Wed Oct 19, 2016 5:11 pm

Upscaling icons, drawings
http://waifu2x.me/
It's a on-line utility , upscaling up to 10x10, using Deep Convolutional Neural Networks
(it's a bit slow, so test with small pictures)
Original picture
Image

Zoom in
Image

Classic soft
Image

Using Waifu
Image

You can also clean photos for jpeg artefacts : (style: photo, magnification :0 , noise reduction high)
Before
Image

After
Image

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XnTriq
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Re: Upscaling / Enlarging

Postby XnTriq » Thu Oct 20, 2016 8:30 pm

Thank you for the examples, michel038 :-D
cday had brought waifu2x to my attention last year when it was first released to the public, but at the time I failed to realize that its potential uses go beyond anime-style art.

XnTriq (Pixel art scaling algorithms such as hq2x, 2xsai, etc) wrote:
  • Microsoft Research
    • Depixelizing Pixel Art
      Naïve upsampling of pixel art images leads to unsatisfactory results. Our algorithm extracts a smooth, resolution-independent vector representation from the image which is suitable for high-resolution display devices.
  • Pixenlarge
    Pixenlarge is an image enlargement tool. It is distributed both as a plug in for Adobe Photoshop and also as a standalone application. It is mainly specialized in enlarging drawn images, such as e.g. clip arts, icons, drawings, sketches, cartoons etc.
  • Scale2x
    Scale2x is real-time graphics effect able to increase the size of small bitmaps guessing the missing pixels without blurring the images.

captaincavern
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Re: Upscaling / Enlarging

Postby captaincavern » Mon Oct 31, 2016 9:03 pm

Two more good ones (both free :D )

http://www.fitswork.de/software/softw_en.php
http://cas.eedept.kobe-u.ac.jp/WelcomeE ... ex_en.html

SAR's PseudoLAD is my fav though.

PS: And this for pixel art: https://sourceforge.net/projects/xbrz/ (Get ScalerTest app)

8)

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XnTriq
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Re: Upscaling / Enlarging

Postby XnTriq » Tue Nov 01, 2016 12:00 am

Thanks, captaincavern!

Tutorials I found helpful (JavaScript required):



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